Citizen CLP-621 Technical Manual page 88

3-5. Disassembly, Reassembly and Lubrication
3-5-8. Ribbon Tension Shaft F SA and Tension Sensor SA
Caution:
DO NOT disassemble the Tension Base Adjust Cam and tension adjust screw (PH,
M1.7x4) unless you need to replace them.
1. Open the Top Cover SA.
2. Remove the Ribbon Sensor F Unit. Refer to 3-5-7 "Ribbon Sensor F/R Unit".
3. Remove 2 screws (NO.0, TFH (BT), M2x4 (NI)) at both ends, and detach the Ribbon Tension
Shaft F SA and Ribbon Guide Roller Bush 2 (2 pcs.).
4. Peel off the Static Eliminator Sheet from the Ribbon Tension Shaft F SA.
5. Remove 1 screw (PH (PW), M2x8), and detach the Tension Adjust Lever F Block and Tension
Adjust Shaft.
6. Remove the Ribbon Sub Adjust Lever F SA and Ribbon Tension Spring F (2 pcs.) from the
Tension Adjust Lever F SA.
7. Remove the tension adjust screw (PH, M1.7x4) from the Tension Adjust Lever F SA.
Note: Do not remove this tension adjust screw unless you need to replace it.
8. Remove 2 screws (NO.0, TFH, M2x3 (NI)) and detach the Tension Sensor SA.
9. Remove 1 screw (NO.0, TFH, M2x3 (NI)), and detach the Tension Base Adjust Cam from the
Ribbon Sensor Frame F SA.
Note: Do not remove the Tension Base Adjust Cam unless you need to replace it.
Cam, Tension Base Adjust
Bush 2, Ribbon
Guide Roller
NO.0, TFH (BH),
M2x4 (NI)
Sheet, Static Eliminator 621
CLP-621 & CLP-631
Shaft, Tension Adjust
NO.0, TFH,
M2x3 (NI)
SA, Tension
Sensor
SA, Ribbon Tension Shaft F
3-16
PH (PW), M2x8
SA, Tension Adjust Lever F
PH, M1.7x4
SA, Ribbon Sub
Adjust Lever F
Spring F, Ribbon Tension
SA, Ribbon Sensor Frame F
NO.0, TFH (BH),
M2x4 (NI)
Bush 2, Ribbon Guide Roller